As New Orleans residents warily track another threatening storm, a new report presents the clearest picture yet of deaths from Katrina in Louisiana. Of the nearly 1,000 who died, almost half were 75 or older, according to researchers...

The results present a tragic portrait of elderly residents who may have thought the warnings were a false alarm, who feared that abandoning their homes would lead to looting, or who simply didn't want to leave their familiar surroundings for the unknown.

That's the problem: complacency. If the government subjects you to dire warnings about imminent catastrophe every few years and nothing bad happens, then sooner or later you stop taking them seriously.